Cisco 400-007 Exam With Confidence Using Practice Dumps

SD-WAN design principles:

C: Centralized policy, simplified management, and dynamic path selection improve operational efficiency, directly resulting in cost savings.

D: SD-WAN provides centralized orchestration, automation, and zero-touch provisioning, simplifying deployment and scaling.

Why other options are incorrect:

A: SD-WAN improves performance with features like dynamic path selection but cannot inherently prevent slow underlay performance.

B: Many SD-WAN solutions logically separate control and data planes, but not all strictly follow full separation like traditional SDN.

E: SD-WAN is typically hardware-agnostic but does not depend on specialized switching hardware.

Graphical user interface Description automatically generated with medium confidence

In this scenario, the application itself duplicates data transmission across two separate NICs on Host A, with the intention that at least one copy will reach Host B, regardless of any single path or link failure. While this increases redundancy at the application and host level, the underlying network must also support rapid failure recovery to avoid packet loss during convergence events.

Among the options provided:

A. EIGRP with feasible successors provides pre-computed backup routes but still requires routing protocol convergence upon failure, which could result in millisecond-scale interruption—enough to cause data loss if packets are in transit.

B. BFD (Bidirectional Forwarding Detection) offers rapid detection of link failures, but by itself does not provide traffic redirection or packet protection; it simply informs the routing protocol faster.

D. Static routes lack dynamic convergence capabilities and would not offer high availability across dynamic failure points unless manually configured with tracking—still less responsive and scalable.

C. IP Fast Reroute (IP FRR) is specifically designed to offer sub-50ms convergence time by pre-installing backup paths in the forwarding plane. Upon detecting a failure, traffic is immediately switched to the pre-computed alternate path without waiting for the routing protocol to reconverge. This ensures minimal disruption and best supports lossless delivery for high-availability applications.

IP FRR is consistent with CCDE v3.1 design principles where sub-second convergence and resiliency are critical in mission-critical enterprise and data center architectures.